Contrasting surface active faults and deep seismogenic sources unveiled by the 2009 L’Aquila earthquake sequence (Italy)

• DOI: 10.1111/ter.12000
• Publication Date: 2012-09-07T12:28:57Z
• Authors: Sabina Bigi; Piero Casero; Claudio Chiarabba; Daniela Di Bucci
• Keywords: Sequence (biology); Fault plane; Thrust fault

Terra Nova, 25, 21–29, 2013 Abstract How reliably can a seismogenic fault be identified in complex tectonic settings such as the Italian Apennines? The aftershocks of Mw 6.3, 2009 L'Aquila earthquake developed both on primary and northwestern, adjacent segment. Here, active Gorzano normal is exposed, many models are based it. Compared with setting, however, aftershock sequence shows that deep does not correspond exposed plane. latter flattens at depth ∼4 km, totally hosted within 6–7 km‐thick thrust sheet. sequence, instead, depicts an independent deeper kinematically reactivated only hangingwall fault. In settings, faults properly characterized through joint analysis geological geophysical data.